Search Results for "oscillator"

** To download everything, MinGPSDO.zip ** The design criteria for this GPSDO (GPS disciplined oscillator) were: ● Output 10MHz accurate to better than ±0.01Hz (1 part per billion) ● Use low cost components (cheapest GPS module, etc.) ● Be self monitoring so the accuracy can be guaranteed without reference to a better standard ● Require no tuning by the user ● Give feedback to the user of the current status ● If it can be done in software, do it in software The initial design consisted of a U-blox NEO-6M GPS receiver with active antenna, a PIC16F1455 microprocessor, a 74HC04 buffer powered by a 5V wall wart. ...

EM-65C02 emulates a Western Design Centre (WDC) 65C02 microprocessor on a Microchip PIC24/33 microcontroller. The code supports varying amounts of RAM and ROM depending on the features of the host device. The emulation speed depends on the device and its oscillator configuration. A PIC24EP running at 70MIPS has emulates a 65C02 running at about 6Mhz. The example code configuration uses a copy of the BBC BASIC ROM image and a simulation of enough of the Acorn MOS to make the BASIC work using a serial UART connection.